Z02215
Single Chip Modem with Integrated Controller, Data Pump, and AFE
50
XTAL
C1=C2 to 2(C2)
VSS*
100K
C
1
, C
2
– The C values are dependent
on the load capacitance of the chosen
crystal. Refer to the Application Note
titled
Crystal Oscillator for Embedded
Modems
at:
C2=20 pF Max.
VSS*
EXTAL
R = 100
K W
* Device ground pin
Figure 5. Oscillator Configuration
Table 11. Suggested Crystal Specifications (C
1
=C
2
=20pF*, C
0
=2pF)
Parameter
Temperature Range (Standard)
Temperature Range (Extended)
Nominal Frequency @ 25
°
C
Frequency Tolerance @ 25
°
C
Temperature Stability @ 0
°
C to 70
°
C
Calibration Mode
Shunt Capacitance (C
0
)
Load Capacitance
Drive Level
Aging, per Year Max.
Oscillation Mode
Series Resistance
Q
* includes pin parasitics
Suggested reading:
IEEE JSSC p222-228 April 1980
IEEE JSSC p774-783 June 1988
Value
0
°
C to +70
°
C
–40
°
C to +85
°
C
24.576 MHz
±20 PPM
±25 PPM
Parallel Resonant
4 pF Max.
15 pF
1.5 mW max.
±5 PPM
Fundamental
25
Ω
max.
70K
PS001907-0904
Operating Notes
ZILOG [ ZILOG, INC. ]
